Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
Nanoscale Res Lett. 2012 Aug 29;7(1):485. doi: 10.1186/1556-276X-7-485.
Silica nanoparticles have been functionalized by click chemistry and atom transfer radical polymerization (ATRP) simultaneously. First, the silanized silica nanoparticles were modified with bromine end group, and then the azide group was grafted onto the surface via covalent coupling. 3-Bromopropyl propiolate was synthesized, and then the synthesized materials were used to react with azide-modified silica nanoparticles via copper-mediated click chemistry and bromine surface-initiated ATRP. Transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis were performed to characterize the functionalized silica nanoparticles. We investigated the enrichment efficiency of bare silica and poly(ethylene glycol) methacrylate (PEGMA)-functionalized silica nanoparticles in Pb(II) aqueous solution. The results demonstrated that PEGMA-functionalized silica nanoparticles can enrich Pb(II) more quickly than pristine silica nanoparticles within 1 h.
通过点击化学和原子转移自由基聚合（ATRP）同时对硅纳米粒子进行功能化。首先，硅烷化的硅纳米粒子用溴端基进行修饰，然后通过共价偶联将叠氮基团接枝到表面上。合成了 3-溴丙炔酸酯，然后通过铜介导的点击化学和溴表面引发的 ATRP 将合成的材料与叠氮修饰的硅纳米粒子反应。通过透射电子显微镜、傅里叶变换红外光谱、X 射线光电子能谱和热重分析对功能化硅纳米粒子进行了表征。我们研究了裸硅纳米粒子和聚（乙二醇）甲基丙烯酸酯（PEGMA）功能化硅纳米粒子在 Pb（II）水溶液中的富集效率。结果表明，PEGMA 功能化的硅纳米粒子在 1 小时内比原始硅纳米粒子更快地富集 Pb（II）。
